[HWYSTR455]

Whew!

The specs on the retainer are different than what the PACs are, not sure how much of an impact there would be if used. Maybe harmonics?

I called and asked Butler, and they say they run the Manley 23660s with the PAC 1243 springs all the time with no issues. I asked about the PAC retainers, and the ones they use, and had in stock, are the R404s. They mimic the Manleys in specs.

PAC catalog:

https://images.carid.com/pac-racing-...ct-catalog.pdf

I looked and the PAC R536 retainers are $495 right now, ouch. The Manleys are $295.

I don't think the locators will make too much of a difference, but again, wonder about harmonics.

The locks match the retainer, so good there.

I went ahead and just told them to use what they recommend, I didn't want to skew the timetable. I've heard folks waiting 3-5 mo for a set of heads, that will be painful, but they said at the moment it's shorter than that. We shall see.

Would have still preferred all matching valve train components, but if they say they run that setup and see no issues, it probably would be fine.

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